scal (USM Version)¶
Computes the product of a vector by a scalar.
Description¶
The scal
routines computes a scalar-vector product:
where:
x
is a vector ofn
elements,alpha
is a scalar.
API¶
Syntax¶
event scal(queue &exec_queue,
std::int64_t n,
T_scalar alpha,
T *x,
std::int64_t incx,
const vector_class<event> &dependencies = {})
The USM version of scal
supports the following precisions and devices.
T |
T_scalar |
Devices Supported |
---|---|---|
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
|
|
Host, CPU, and GPU |
Input Parameters¶
- exec_queue
The queue where the routine should be executed.
- n
Number of elements in vector
x
.- alpha
Specifies the scalar
alpha
.- x
Pointer to the input vector
x
. The array must be of size at least (1 + (n
- 1)*abs(incx
)). See ref:matrix-storage for more details.- incx
Stride of vector x.
Output Parameters¶
- x
Pointer to the updated array
x
.
Return Values¶
Output event to wait on to ensure computation is complete.